[xen staging] xen/param: address violation of MISRA C Rule 20.7

[patchbot@xxxxxxx]

commit c7376ee3229a4dca9fffb4ab82f415921a7fa09c
Author:     Nicola Vetrini <nicola.vetrini@xxxxxxxxx>
AuthorDate: Tue Nov 25 10:23:11 2025 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Nov 25 10:23:11 2025 +0100

    xen/param: address violation of MISRA C Rule 20.7
    
    The rule states: Expressions resulting from the expansion of
    macro parameters shall be enclosed in parentheses.
    
    Add parentheses in the defition of `custom_runtime_var_sz' to
    address the violations.
    
    No functional change.
    
    Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/include/xen/param.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/include/xen/param.h b/xen/include/xen/param.h
index 1bdbab34ab..f5a2189400 100644
--- a/xen/include/xen/param.h
+++ b/xen/include/xen/param.h
@@ -102,8 +102,8 @@ extern struct param_hypfs __paramhypfs_start[], 
__paramhypfs_end[];
 
 #define custom_runtime_set_var_sz(parfs, var, sz) \
     { \
-        (parfs)->hypfs.u.content = var; \
-        (parfs)->hypfs.e.max_size = sz; \
+        (parfs)->hypfs.u.content = (var); \
+        (parfs)->hypfs.e.max_size = (sz); \
         (parfs)->hypfs.e.size = strlen(var) + 1; \
     }
 #define custom_runtime_set_var(parfs, var) \
--
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